A package is dropped at time t=0 from a helicopter S that is descending steadily at a speed vi. (a) What is the speed of the package in terms of vi, g, and t? (b) What vertical distance d is it from the helicopter in terms of g and t? (c) What are the answers to parts (a) and ...
the half-life of iodine-131 is 8 days. how much iodine-131 will be left after 8 days if you have an initial mass of 1g ?